diff --git a/admin-dev/tabs/AdminEmails.php b/admin-dev/tabs/AdminEmails.php
index 45ee96040..5293cb872 100644
--- a/admin-dev/tabs/AdminEmails.php
+++ b/admin-dev/tabs/AdminEmails.php
@@ -1,6 +1,6 @@
 <?php
 /*
-* 2007-2011 PrestaShop 
+* 2007-2011 PrestaShop
 *
 * NOTICE OF LICENSE
 *
@@ -35,7 +35,7 @@ class AdminEmails extends AdminPreferences
 		$this->table = 'configuration';
 
 		parent::__construct();
-		
+
 		foreach (Contact::getContacts($this->context->language->id) AS $contact)
 			$arr[] = array('email_message' => $contact['id_contact'], 'name' => $contact['name']);
 
@@ -53,7 +53,7 @@ class AdminEmails extends AdminPreferences
 				'title' =>	$this->l('E-mail'),
 				'icon' =>	'email',
 				'fields' =>	array(
-					'PS_MAIL_DOMAIN' => array('title' => $this->l('Mail domain:'), 'desc' => $this->l('Fully qualified domain name (keep it empty if you do not know)'), 'validation' => 'isUrl', 'size' => 30, 'type' => 'text', 'visibility' => Shop::CONTEXT_ALL),
+					'PS_MAIL_DOMAIN' => array('title' => $this->l('Mail domain:'), 'desc' => $this->l('Fully qualified domain name (keep it empty if you do not know)'), 'empty' => true, 'validation' => 'isUrl', 'size' => 30, 'type' => 'text', 'visibility' => Shop::CONTEXT_ALL),
 					'PS_MAIL_SERVER' => array('title' => $this->l('SMTP server:'), 'desc' => $this->l('IP or server name (e.g., smtp.mydomain.com)'), 'validation' => 'isGenericName', 'size' => 30, 'type' => 'text', 'visibility' => Shop::CONTEXT_ALL),
 					'PS_MAIL_USER' => array('title' => $this->l('SMTP user:'), 'desc' => $this->l('Leave blank if not applicable'), 'validation' => 'isGenericName', 'size' => 30, 'type' => 'text', 'visibility' => Shop::CONTEXT_ALL),
 					'PS_MAIL_PASSWD' => array('title' => $this->l('SMTP password:'), 'desc' => $this->l('Leave blank if not applicable'), 'validation' => 'isAnything', 'size' => 30, 'type' => 'password', 'visibility' => Shop::CONTEXT_ALL),
@@ -69,13 +69,13 @@ class AdminEmails extends AdminPreferences
 		if ($_POST['PS_MAIL_METHOD'] == 2 AND (empty($_POST['PS_MAIL_SERVER']) OR empty($_POST['PS_MAIL_SMTP_PORT'])))
 			$this->_errors[] = Tools::displayError('You must define a SMTP server and a SMTP port. If you do not know, use the PHP mail() function instead.');
 	}
-	
+
 	public function display()
 	{
 		parent::display();
 		$this->_displayMailTest();
 	}
-	
+
 	private function _displayMailTest()
 	{
 		echo '
diff --git a/classes/AdminTab.php b/classes/AdminTab.php
index 265f99396..8599114a5 100644
--- a/classes/AdminTab.php
+++ b/classes/AdminTab.php
@@ -958,7 +958,7 @@ abstract class AdminTabCore
 					if (!Tools::getValue($field) AND isset($values['default']))
 						$_POST[$field] = $values['default'];
 
-				if (!sizeof($this->_errors))
+				if (1||!sizeof($this->_errors))
 				{
 					foreach ($fields as $key => $options)
 					{
@@ -1024,8 +1024,7 @@ abstract class AdminTabCore
 	{
 		if (isset($field['validation']))
 		{
-			$validate = new Validate();
-			if (method_exists($validate, $field['validation']))
+			if ((!isset($field['empty']) || !$field['empty'] || (isset($field['empty']) && $field['empty'] && $value)) && method_exists('Validate', $field['validation']))
 			{
 				if (!Validate::$field['validation']($value))
 				{
@@ -1962,7 +1961,7 @@ abstract class AdminTabCore
 	public function displayOptionTypeRadio($key, $field, $value)
 	{
 		foreach ($field['choices'] as $k => $v)
-			echo '<input type="radio" name="'.$key.'" id="'.$key.$k.'_on" value="'.(int)$v.'"'.(($k == $value) ? ' checked="checked"' : '').(isset($field['js'][$k]) ? ' '.$field['js'][$k] : '').' /><label class="t" for="'.$key.$k.'_on"> '.$v.'</label><br />';
+			echo '<input type="radio" name="'.$key.'" id="'.$key.$k.'_on" value="'.(int)$k.'"'.(($k == $value) ? ' checked="checked"' : '').(isset($field['js'][$k]) ? ' '.$field['js'][$k] : '').' /><label class="t" for="'.$key.$k.'_on"> '.$v.'</label><br />';
 		echo '<br />';
 	}